Re: Difference between method overriding and overloading

Method overriding is a feature in Object Oriented programming language. This is used to implement a method for subclass which overrides in other words replaces the implementation of the super class. Overloading the concept of providing different meaning to a object based on the context of its presence. Overloading is one type of polymorphism and this is also a feature in Object Oriented programming language.

Re: Difference between method overriding and overloading

In overriding,
The method of a sub class takes priority over its counterpart in the super-class.

where as in Overloading,
2 or more methods with same name are available (have no priority over each other) but differ in their declaration and/or definition. Either of them may be executed depending on the number and/or type of arguments passed.

Re: Difference between method overriding and overloading

Using overloading and overridding, you can acheive the concept of polymorphism.

Polymorphism means "one name, multiple forms". Using one name u can do multiple of actions...

Method overloading is a compile time polymorphism and Method Overridding is a runtime polymorphism...

Compile time polymorphism means compiler knows which object assigned to which class at the compiling time....Runtime polymorphism means compiler didn't know at the compile time, it only knows at a run time...

Re: Difference between method overriding and overloading

Overloading methods
1.They appear in the same class or a subclass
2.They have the same name but, have different parameter lists, and can have different return types.
An example of an overloaded method is print() in the java.io.PrintStream class

Overriding methods
It allows a subclass to re-define a method it inherits from it's superclass
overriding methods:
1. It appears in subclasses
2. They have the same name as a superclass method
3. They have the same parameter list as a superclass method
4. They have the same return type as as a superclass method
5. They have the access modifier for the overriding method may not be more restrictive than the access modifier of the superclass method
&#183;If the superclass method is public, the overriding method must be public
&#183;If the superclass method is protected, the overriding method may be protected or public
&#183;If the superclass method is package, the overriding method may be packagage, protected, or public
&#183;If the superclass methods is private, it is not inherited and overriding is not an issue

Re: Difference between method overriding and overloading

What is overloading in java ?
In Java it is possible to define two or more methods within the same class that share the same name, as long as their parameter declarations are different. When this is the case,the methods are said to be overloaded, and the process is referred to as method
overloading. Method overloading is one of the ways that Java implements polymorphism.

What is Overriding in java ?
when a method in a subclass has the same name and type signature as a method in its superclass, then the method in the subclass is said to override the method in the superclass. When an overridden method is called from within a subclass, it will always refer to the version of that method defined by the subclass.

Re: Difference between method overriding and overloading

overlaoding:functions having same name and same signature.It is a run time polymorphism.Eg: virtual function
overlaoding:function having same name but different signature.It is a compile time polymorphism.Eg: operator overloading and function overloading.

Re: Difference between method overriding and overloading

method overloading is designtime polymorphism whereas method overriding is runtime polymorphism..
In overloading the parameters should be uniqe i.e the no of parameters shud differ or if same no of parameters r there the signature shud differ
why because the compiler should know the methods in complintime only.
whereas in overriding we reimplement or change the functionality of the base class method in derived class .the no of parameters & return type shud be same ..

method overriding and ovverloading

Overriding method definitions
In a derived class, if you include a method definition that has the same name and exactly the same number and types of parameters as a method already defined in the base class, this new definition replaces the old definition of the method.

Explanation
A subclass inherits methods from a superclass. Sometimes, it is necessary for the subclass to modify the methods defined in the superclass. This is referred to as method overriding. The following example demonstrates method overriding.

Step 1
In this example we will define a base class called Circle

class Circle {

//declaring the instance variable
protected double radius;

public Circle(double radius) {
this.radius = radius;
}

// other method definitions here

public double getArea() {
return Math.PI*radius*radius;
}//this method returns the area of the circle

}// end of class circle

When the getArea method is invoked from an instance of the Circle class, the method returns the area of the circle.

Step 2
The next step is to define a subclass to override the getArea() method in the Circle class. The derived class will be the Cylinder class. The getArea() method in the Circle class computes the area of a circle, while the getArea method in the Cylinder class computes the surface area of a cylinder.

Re: Difference between method overriding and overloading

Re: Difference between method overriding and overloading

Overriding is the Functionality by witch a programmer can change the old functionality of any function even if he does`t know that what was the old one.
But in Overloading you have to change the parameter or the return type. this is the Conceptual difference

Re: Difference between method overriding and overloading

In object oriented programming, Overloading is having the same method name with different signatures by which you can provide a different implementation for the same method name call.

Overriding has to do with inheritance super and sub class relationship. For overriding, method name and signatures should be same between the superclass and subclass. At runtime depending upon the object whether it is of superclass or subclass the functionality get called at provide different implementations.

About us

Applying for a job can be a stressful and frustrating experience, especially for someone who has never done it before. Considering that you are competing for the position with a at least a dozen other applicants, it is imperative that you thoroughly prepare for the job interview, in order to stand a good chance of getting hired. That's where GeekInterview can help.